What must someone who is a heavy sleeper and does not wake up to an alarm for the Dhuhr prayer do so that he is not negligent in missing the prayer?

Prayer is the pillar of faith and the first thing a person will be held accountable for. It must be performed on time, and whoever sleeps after the prayer time has begun, knowing that they will not wake up until after its time has expired, is sinful. One must take the necessary measures to wake up for prayer, such as sleeping early, making the intention, using an alarm clock, or appointing someone to wake them. Otherwise, a person exposes themselves to the severe warning mentioned in the Quran.